Peel and cut the mango into chunks. Add it on a baking tray that can fit in your freezer, and freeze for at least 4 hours; best if you do this one day in advance.
Transfer the frozen mango chunks to a high-speed blender or food processor.Add the milk and maple syrup, and blend until smooth, stopping occasionally to scrape down the sides.It should take you about one minute with a high-speed blender and a couple of minutes with a food processor.
SOFT-SERVE MANGO
Scoop the blended mango into a bowl and serve immediately as is or with fresh berries and mint leaves.
FROZEN MANGO
Transfer the blended mango to a loaf pan, flatten it with a spatula, and freeze for 3 to 4 hours.Note: if you freeze it for longer, then it will turn into a block of ice. You'll have to take it out of the freezer 15 to 20 minutes before serving.